Electrocardiograph



FIG. 1 is a top view of an electrocardiograph showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front elevation thereof;

FIG. 4 is a rear elevation thereof;

FIG. 5 is a left elevation thereof;

FIG. 6 is a right elevation thereof, and

FIG. 7 is a perspective view of FIG. 1 as seen from the top, front and left thereof. 

The ornamental design for an electrocardiograph, as shown. 